- Tool-level response to the verification duty articulated in Mata, Park v. Kim, and the Oregon Supreme Court line.
- Built by BrentWorks: Brent Britton (technology attorney, MIT-trained engineer) and Brent Hunter (neural networks technologist).
- Marketed for both defensive use (catching your own AI hallucinations before filing) and offensive use (catching opposing counsel's).
- No pricing or availability published in the launch coverage as of June 5, 2026.
BrentWorks launches CiteSentinel for AI-citation hallucination detection.
BrentWorks, co-founded by technology attorney Brent Britton and neural networks technologist Brent Hunter, has launched CiteSentinel, a tool that scans legal documents for fabricated case citations and statute references before filing. The product targets a problem the post-Mata case law has now made unmistakeable: lawyers cannot rely on AI-generated authority without independent verification.
The lede. #
CiteSentinel, from BrentWorks, is a new entrant in the AI-hallucination-detection category for legal filings, positioned as both a defensive review tool and as an offensive aid for catching opposing counsel's fabrications.
What happened. #
On June 5, 2026, GEN reported the launch of CiteSentinel, a citation-verification platform built by BrentWorks. CiteSentinel scans legal documents and flags fabricated case citations, statute references, and quoted passages that do not appear in the cited authority. The product is positioned as "the first in a series of products" the company plans to release for AI-era law practice. The biotech litigation context is the marketing wedge: AI tools can "invent scientific references that do not exist," "mischaracterize FDA guidance documents," or "fabricate patent precedents." The product's framing emphasises that AI systems can "confidently lie to your face," a phrase from the co-founder that captures the post-Mata sanctions-risk picture.
Why it matters. #
CiteSentinel is an example of a tool-layer response to a governance-layer problem. A verification tool is necessary but not sufficient. The lawyer's duty under FRCP 11 and state analogues is not discharged by running a brief through a citation-scanner; the duty is to verify each authority cited supports the proposition for which it is offered, and that verification requires reading the underlying source. CiteSentinel and similar products help catch the most obvious fabrications, but they do not substitute for citation-discipline at the lawyer's level. For firm-level governance, the right posture is to layer the tool above an already-disciplined verification workflow, not to use the tool as a substitute for the workflow.
What to watch. #
Three things. First, the pricing model and availability when BrentWorks publishes them; will it be enterprise-only, SMB-affordable, or both. Second, how the product interacts with Westlaw, Lexis, and HeinOnline at the database-access layer; verification depth depends on which underlying corpus the tool consults. Third, whether the broader category fills in around CiteSentinel; expected entrants include Casetext-derived tools, Lexis Protégé extensions, and integrated checks within Harvey and Spellbook. Coverage of the developing tool market will be cross-referenced in IXSOR's vendor-profile library as those products become available.
Primary sources. #
- CiteSentinel launched to detect and prevent AI hallucinations in legal citations, GEN
- FRCP 11, Legal Information Institute
- Mata v. Avianca opinion, CourtListener
News brief. Not legal advice. Dan Hughes is not an attorney; IXSOR does not provide legal services.